Low shrinkage polyester resin compositions

Details Low shrinkage polyester resin compositions Low shrinkage polyester resin compositions

1979-12-04

1981-02-17

Ziegler, J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Ethylenically unsaturated reactant admixed with either...

525 34, 525444, 525445, C08L 6700

Patent

active

042516412

ABSTRACT:
Unsaturated polyester resin compositions that have a low shrinking property, and at the same time, an enough strength are provided. The compositions comprises (1) 30-70 parts by weight of an unsaturated polyester obtained by reactin terephthalic acid and/or isophthalic acid and one or more of unsaturated acids selected from the group consisting of maleic anhydride, maleic acid and fumaric acid, with a glycol, and having the unsaturation degree of 1.5-5.0 and the acid value of 18-40, (2) 70-30 parts by weight of .alpha.,.beta.-ethylenically unsaturated monomer, and (3) 5-30 parts by weight of an amorphous linear saturated polyester resin obtained by reacting terephthalic acid and/or isophthalic acid with a glycol component.

REFERENCES:
patent: 3489707 (1970-01-01), Fry

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